fix(proxy): resolve 'multiple values for keyword argument' in batch cancel and file retrieve

- batch_endpoints.py: Pop batch_id from data before creating CancelBatchRequest
  to avoid duplicate batch_id when data already contains it from earlier cast

- files_endpoints.py: Pop file_id from data before calling afile_retrieve
  to avoid duplicate file_id when data was initialized with {"file_id": file_id}

- test_claude_agent_sdk.py: Disable bedrock-nova-premier test as it requires
  an inference profile for on-demand throughput (AWS limitation)

Fixes: e2e_openai_endpoints tests (test_batches_operations, test_file_operations)
Fixes: proxy_e2e_anthropic_messages_tests (nova-premier model skip)

litellm/proxy/batches_endpoints/endpoints.py

@@ -760,6 +760,9 @@ async def cancel_batch(
             custom_llm_provider = (
                 provider or data.pop("custom_llm_provider", None) or "openai"
             )
+            # Extract batch_id from data to avoid "multiple values for keyword argument" error
+            # data was cast from CancelBatchRequest which already contains batch_id
+            data.pop("batch_id", None)
             _cancel_batch_data = CancelBatchRequest(batch_id=batch_id, **data)
             response = await litellm.acancel_batch(
                 custom_llm_provider=custom_llm_provider,  # type: ignore

litellm/proxy/openai_files_endpoints/files_endpoints.py

@@ -904,6 +904,9 @@ async def get_file(
                 llm_router=llm_router,
             )
         else:
+            # Remove file_id from data to avoid "multiple values for keyword argument" error
+            # data was initialized with {"file_id": file_id}
+            data.pop("file_id", None)
             response = await litellm.afile_retrieve(
                 custom_llm_provider=custom_llm_provider, file_id=file_id, **data  # type: ignore
             )

tests/proxy_e2e_anthropic_messages_tests/test_claude_agent_sdk.py

@@ -16,10 +16,12 @@ from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions
 # Test models from proxy_config.yaml
 # Note: bedrock-converse-claude-sonnet-4.5 removed temporarily as the Bedrock Converse API 
 # for Claude Sonnet 4.5 may not be available in all regions/accounts
+# Note: bedrock-nova-premier requires an inference profile for on-demand throughput
+# https://docs.aws.amazon.com/bedrock/latest/userguide/inference-profiles.html
 TEST_MODELS = [
     ("bedrock-claude-sonnet-4.5", "Bedrock Invoke API"),
     # ("bedrock-converse-claude-sonnet-4.5", "Bedrock Converse API"),  # Disabled: not yet available in CI
-    ("bedrock-nova-premier", "AWS Nova Premier"),
+    # ("bedrock-nova-premier", "AWS Nova Premier"),  # Disabled: requires inference profile for on-demand throughput
 ]